title: ICD9 codes cannot reliably identify hemorrhagic transformation of ischemic stroke.
authors.affiliation: Department of Neurology, University of Pennsylvania, Philadelphia, PA 19104, USA. michael.mullen@uphs.upenn.edu
authors.forename: Michael T
authors.initials: MT
authors.lastname: Mullen
authors.forename: Charles J
authors.initials: CJ
authors.lastname: Moomaw
authors.forename: Kathleen
authors.initials: K
authors.lastname: Alwell
authors.forename: Jane C
authors.initials: JC
authors.lastname: Khoury
authors.forename: Brett M
authors.initials: BM
authors.lastname: Kissela
authors.forename: Daniel
authors.initials: D
authors.lastname: Woo
authors.forename: Matthew L
authors.initials: ML
authors.lastname: Flaherty
authors.forename: Pooja
authors.initials: P
authors.lastname: Khatri
authors.forename: Opeolu
authors.initials: O
authors.lastname: Adeoye
authors.forename: Simona
authors.initials: S
authors.lastname: Ferioli
authors.forename: Dawn
authors.initials: D
authors.lastname: Kleindorfer
mesh_terms: D002545:Brain Ischemia / Q000145:classification* / Q000175:diagnosis / Q000453:epidemiology / Q000628:therapy; D006801:Humans; D038801:International Classification of Diseases; D020300:Intracranial Hemorrhages / Q000145:classification* / Q000175:diagnosis / Q000453:epidemiology / Q000628:therapy; D007629:Kentucky / Q000453:epidemiology; D009820:Ohio / Q000453:epidemiology; D011379:Prognosis; D019984:Quality Indicators, Health Care; D020521:Stroke / Q000145:classification* / Q000175:diagnosis / Q000453:epidemiology / Q000628:therapy; D009626:Terminology as Topic
keywords: ICD9; hemorrhagic transformation; ischemic stroke